6NUR:
reference: Structure of the SARS-CoV nsp12 polymerase bound to nsp7 and nsp8 co-factors., Kirchdoerfer RN, Ward AB, Nat Commun. 2019 May 28;10(1):2342. doi: 10.1038/s41467-019-10280-3. PMID: 31138817

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).